This bra runs small in the band and large in the cups. It is just the white bra I am a selling. The purple is also a 30F and in almost an inch smaller in the cup. The band only stretches to about 29 inches and the cups run big, I think it might fit a 28G decently, or a 30FF if you are on the smaller side of the 30.

Am interested in anything near my size 30E/F or 32E/F if the cups run large I can do a 32DD and if they run small 30FF.